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CVE-2018-11406

27
FAUCET Score

CVE-2018-11406 is a CSRF token fixation vulnerability affecting Symfony versions 2.7.x, 2.8.x, 3.3.x, 3.4.x, and 4.0.x, specifically when the invalidate_session option is disabled during logout. This flaw allows an attacker to fixate a user's CSRF token, potentially leading to high impact on confidentiality, integrity, and availability. Despite its high CVSS score of 8.8, there is no known active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.7.0, < 2.7.48CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 2.8.0, < 2.8.41CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 3.3.0, < 3.3.17CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 3.4.0, < 3.4.11CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.11CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.76%
Probability of exploitation in next 30 days
EPSS Percentile
51.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0076 is in the 53rd percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (20)

composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 2.7.48
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 2.8.41
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 3.4.11
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 4.0.11
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 3.3.17
composerpatch availablevia ghsa
Product: symfony/security-bundleFixed in: 2.7.48
composerpatch availablevia ghsa
Product: symfony/security-bundleFixed in: 2.8.41
composerpatch availablevia ghsa
Product: symfony/security-bundleFixed in: 3.3.17
composerpatch availablevia ghsa
Product: symfony/security-bundleFixed in: 3.4.11
composerpatch availablevia ghsa
Product: symfony/security-bundleFixed in: 4.0.11
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 2.7.48
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 2.8.41
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 3.3.17
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 3.4.11
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 4.0.11
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 2.7.48
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 2.8.41
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 3.3.17
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 3.4.11
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 4.0.11

Vendor Advisories (1)

composerGHSA-g4g7-q726-v5hghigh

Symfony CSRF Token Fixation

May 14, 2022

References

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/G4XNBMFW33H47O5TZGA7JYCVLDBCXAJV
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/UBQK7JDXIELADIPGZIOUCZKMAJM5LSBW
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WU5N2TZFNGXDGMXMPP7LZCWTFLENF6WH
symfony.com / blog/cve-2018-11406-csrf-token-fixation
Vendor Advisory
debian.org / security/2018/dsa-4262
Third Party Advisory